The product is composed of a host machine, hammer, edge clamp, recording tape, toner paper plate etc.. The main engine size is not less than 150 * 60 * 55mm, the size of the control point trace, the output frequency selector switch, the power switch and the indicator light are all on the main board, and can be adjusted according to the experiment. Products using the power supply voltage: AC220V±22V, frequency: 50Hz±0.5Hz; product can output 20Hz, 50Hz, 100Hz high voltage pulse EDM, discharge time, the corresponding interval is 0.05s, 0.02s, 0.01s, the size of the output of the electric spark track adjustable. Quality: 50 RBI RBI continuous leak point, clear ideas, the diameter is not greater than 0.8mm.